H3C Technologies H3C WA2600 Series WLAN Access Points - Manual (Page 21)

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PPPoE Configuration
This chapter includes these sections:
z Introduction to PPPoE
z Configuring a PPPoE Client
z Displaying and Maintaining PPPoE
z PPPoE Configuration Example
Introduction to PPPoE
PPPoE
Currently, the AP cannot operate as a PPPoE server, and whether it can operate as a PPPoE client
depends on the AP model.
Point-to-Point Protocol over Ethernet (PPPoE) uses the client/server model. It establishes point-to-point
links over Ethernet, and encapsulates PPP packets in Ethernet frames.
APs configured as PPPoE clients can access the Internet through a remote access device, and access
control and accounting can be implemented on a per-AP basis.
PPPoE undergoes two phases: discovery and PPP session, as described below:
z Discovery phase, where a PPPoE session is initiated. In this phase, the host obtains the MAC
address of the access end and generates the PPPoE session ID. When the discovery phase ends,
the PPPoE session ID between the host and the server is determined, and the PPP session phase
begins.
z PPP session phase, where PPP packets are encapsulated in Ethernet frames before being sent to
the peer. In the frame, the session ID must be the one determined in the discovery phase, the MAC
address must be that of the peer, and the PPP packet section begins from the Protocol ID field. In
Session phase, either end of the link can terminate the session by sending PPPoE Active
Discovery Terminate (PADT) packets.
For more information about PPPoE, see RFC 2516.